These two stamps show the transition from the Saxonian Grand Ducal Willhelm and Luise Zimmermann “Realschule” to the Library of the Grand Ducal “Realgymnasium”. This change took place in 1911. A Realschule wanted to prepare their students to higher positions in normal workforce. The Realgymnasium, on the other hand, offered their students the education to magistrate positions. Interestingly, the older stamp is more classic with its round form and the second one seems boring, but contains a pre-selected place for the signature, which can be added by hand.